That's the problem with police chiefs in "gun-free" (or nearly so) jurisdictions. To them, anything more than one 20- or 25-round box of ammunition is an "arsenal."

The chief would no doubt have a stroke if he saw my basement.

The real question is: Considering that the bombers lived in Massachusetts, and Massachusetts has some of the most restrictive gun laws in the country ... how and where did they get whatever guns they had?